Device for emptying superphosphate out of decomposition-chambers.



K. J. BESKOW & M. EKEDAHL.

DEVICE FOR EMPTYING SUPERPHOSPHATE OUT OF DECOMPOSITION CHAMBERS. KPPLIOATION FILED FEB. 23, 1909.

956 792. Patented May 3, 1910.

2 SHBETSSHBET .1.

WIT/V556'ES K. J. BBSKOW & M.. EKBDAHL. I DEVIGEFOB. EMPTYING SUPEBPHOSPHATE OUT OF DEGOMPOSITION OHAMB HRS.

APPLICATION FILED FEB 23, 1909.

Patented May 3, 1910;

f JG I' UNITED sra'rns arana OFFICE.

KNUT JAKOB BESKOIV, OF HELSINGBORG, AND MELCHEB, EKEDAHL, F LIMHAMN,

I SWEDEN.

DEVICE FOR EMPTYING SUPERPHOSPHATE OUT OF DECOMPOSITION-CHAMBERS.

Specification of Letters Patent.

Patented stay 3, ialfi.

Application filed February 23, 1.909. Serial No. 478,436.

Helsingborg, in the Kingdom of Sweden,

and MELCHER EKEDAHL, accountant, subject of the King of Sweden, and residing at Limhamn, in the Kingdom of Sweden, have invented new and useful Improvements in Devices for Emptying Superphosphate Out of Decomposition-Chambers, of which the following is a specification.

Of late years a number of. different devices for the emptying of superphosphate out of the decomposition chambers have come into use. Most of these devices, however, are either pretty complicated and ex-. pensive or else are constructed upon false principles. To the former category belong, in our opinion such devices in which a special reaction vessel is used and, among the latter category all such emptying devices ought to be counted in which the mass of superphosphate from the upper surface of the heap of the same is acted upon by dredging or plowing implements. For on a workingof the upper surface of the superphoshate mass, the superphosphate cut loose is dragged on the mass, and of course, in this process a kneading-together in some degree of the superphosphate which in fresh condition'is very sensitive against pressure can hardly be avoided. Therefore it must be more proper to work the heap of superphosphate from the side. In so doing, this advantage is gained that the superphosphate which is newly cut loose, falls down immediately, giving off some moisture in fallingwhereby it can later on more easily allow itself to be transported without becoming doughy. Thus the' superphosphate cut loose need not, in this latter case be transported on superphosphate.

In accordance with the present invention the emptying of the decomposition-chamber takes place in such a way that the heap of superphosphate is on one side exposed to the act-ion of cutting or shoveling devices, which are of such a character that they at the same time cut loose the superphosphate from the superphosphate and side of the heap 0 transport the mass cut loose to a certain lace inside or outside the chamber. It has, owever, been a matter of great difficulty,

remaining superphosphate to invent a cutting or shoveling device which is capable in practice of being advantageously used for this purpose, which device for said purpose must be of such a character that it can'be brought to pass through the whole chamber so that it passes over the whole bottom of the same. In accordance with the present invention this problem is solved in such a way, that the said device is pivotally carried on a vertical shaft'or axle in such a way that it may be swung through the whole chamber along the bottom of the same. With this device the great advantage is at the same time gained, that all thesuperphosphate may be emptied out of the chamber at one and the same -plaee,-

where it can fall directly down for example into a disintegratin machine for superphos phate without requiring the use of a transport-band or other special transport implements. In order to illustrate the invention there are shown, by way of example, in the accompanying drawing several. embodiments of the invention.

Figure 1 shows in vertical section a decomposition chamber for superphosphate arranged in accordance with the present invention, together with the device belonging thereto for the emptying of the chamber. Fig. 2 shows the same in horizontal section. Figs. 3 and 4 show in the same way another form of construction of the device in ques: tion. horizontal cross section another form of the decomposition chamber comprising the present invention. Fig. 6 shows in vertical section and Fig. 7 in still another form of the invention,

In Figs. 1 and 2, 1 indicates the decomposition chamber itself which in horizontal section can suitably have the form somewhat like a segment of a circle, shown in Fig. 2. Intothis chamber which is provided with a removable wall or walls 13, is introduced. the superphosphate mixture or composition which is intended to be decomposed, which mixture during the reaction there taking place stilfens to a dough-like mass of such a consistency, that it will not run out when the wall or walls 13 horizontal cross section;

are removed for the purpose of emptying the superphosphate out of the 2 is a vertical shaft rotatably arranged in about the center of the circle after which the inner side of one part of the wall of the chamber is formed, which shaft is adapted to be turned by arrangements suitable for the pur ose, for example, by mwns of a ley 3,

her, into which channel which is carried rotatably ulxed on the same. To the shall; 2 there is firmly attached an arm 6 which carries the cuttlng or shovelin tools proper. These tools can suitably consist of bent, vertically arranged scoops or blades 8 which are fastened on the circumference of a drum 7 firmly attached on a shaft 15 rotatably journaled in the arm 6, so that the drum 7 thus comes to be carried by the said arm. The drum 7 is put into rotation by means of devices suitable for the purpose for example, an electric motor 10arranged on the arm 6, which motor stands in gearing connection with a gear 28 fixed on the shaft 15. By turning the shaft 2 the arm 6 can be swun out of the chamber as is indicated by the otted lines in Fig. 2, or swung into the chamberas is shown by full lines in the same figurein such a wa that the drum 7 will pass over the whole ottom of the chamber. With this device the em tying of the superphosphate mass out of tlie decomposition chamber is carried out in the followingway. After the removable walls 13 have been taken away so that one side of the heap of superphosphate within the chamber is exposed, the drum, by the arm 6, is swung in toward the exposed side-surface of the heap of the superphosphate by means of a slow rotation of the shaft 2. Simultaneously therewith the drum 7 is put in rotation by the motor 10, in doing which the cutting or shoveling tools 8 by degrees cut off the superphosphate mass from the side of the heap of superphosphate and at the same time transport it to an open channel or passage 14: issuing from the center of the chamthe super hosphate falls. After all the superphosp ate mass has been thus removed from the decomposition chamber, the drum 7 is swung out of the chamber and the walls 13 are replaced so that the chamber is again put in order for the reception of a new charge.

In Figs. 3 and 4 the corresponding parts are indicated with the same numerals of reference as in Figs. 1 and 2. The form of construction shown in Fi 3 and 4 of the device in question differs om that shown in Figs. 1 and 2 with respect to the devices intended for the carrying and driving of the cutting or shoveling tools and with respect to the form of the decomposition chamber thereby rendered necessary. According to this form of construction the shovels 8 are attached to endless chains or belts 29, arranged on rolls 9 which rolls are rotatably su ported by the arm 6. This arm is rig idl; attached to the rotatably arranged shaft 2 which is driven by the shaft 5 by means of a gear 4 which meshes with a gear 4' fixed on the shaft 2. The one roll 9 is driven by the shaft 12 by means of a gear 11, fixed on the lower end of the said shaft 12, which shaft goes right through the shaft 2 which in this case is hollowand a gear 11 which is fixed on the shaft 30 of the said roll 9. By rotating the shaft 2 the arm 6 can thus, to ther with the cutting or shoveling too s supported by the same, be swung out of the chamber'as is indicated by the dotted lines, in Fig. 4 or into the chamber and over the whole of its bottom surface. When the shovels or blades 8 are put invmotion as has been described above, by rotating the shafts 5, 2 and 12 they cut off superphosphate from the side of the heap of superphosphate and transport the same to the passagel l where it falls down and is carried away for further treatment. The length of the scoops 8 corresponds, of course, to the depth of the heap of superphos hate. These scoops can be placed vertical y, as shown in the drawing or more or less obliquely.

By removing the superphosphate mass out of the decomposition chamber, in the way described above, there is gained that the caking together of the same is avoided, at the same time that the work can be carried out by relatively simple means, and without the workmen needing to expose themselves to the effects of the unwholesome gases present in the decomposition chamber.

It ought to be understood that the decomposition chamber also may be given such a orm that its horizontal section occupies a whole circle or nearly a whole circle and that the said chamber, as it is diagrammatically shown in Fig. 5, may by means of removable vertical partition walls 13 be divided into two or more divisions, in order that the charging rocess may take place in one division at t e same time as the decomposition or reaction and emptying process is going on in the other division or divisions, which emptying process then may be carried out by means of one and the same empt in machinery common to all divisions. ai machinery may for said pur ose be of the construction above describe and preferably pivotally supported by a vertical shaft 2 placed in the center of the chamber coincidmg with the middle of the passage 14. The opening of this passa e-is surrounded by removable walls 13. hen a division is to be emptied, the said walls 13 belongin to that division are removed (see dotted lines in Fig. 5) so that the superphosphate shoveled loose from the side of the hea by the tools 18 may by the shoveling tools e transported into said passage and thus carried off from the chamber.

According to Figs. 1-5 means are provided for protecting the emptying; machinery against the mass of superphosphate when this is charged intothe chamber. For carrying out the emptying process according to the present invention it is however not necessary that the said machinery be arranged outside the decomposition chamber and swung into the chamber when this latter is to be emptied but instead it may also be. .wholly -or partly arranged within the de composition chamber itself. In this latter case the small portion of the superphosphate which perhaps should hinder the starting of the mechanical emptying process must be shoveled away by hand. By way of example there is shown in Figs. 6 and 7 of the accompanying drawin a form of the decomposition chamber with the shaft on which the emptying machinery is turned arranged inside the decomposition chamber 1. This chamber which at its top is provided with a mixer 28 for the materials to be charged into the chamber, is at one side provided with a movable door 24 through which entrance into the chamber is secured. The upper opening of the passage or channel 14 serving for carrying off the superphosphate from the chamber as above stated is located in the middle of the chamber surroundin the shaft 17 by which the emgotyaid - same manner as above described and shown in Fi chamber there is a pulley 23 fixed on the.

upper end of the shaft of the one roll 9, located nearest the periphery. The said pulley 23 is driven by meansof an endless belt 25 from a pulley 22 fixed on a rotatable shaft 16 which goes through the hollow shaft 17 and which at its upper and lower end is journaled in suitable bearings. Said shaft 16 carries at its lower end a pulley 19, fixed thereto which pulley is driven by means of an endless belt 27. By this means the shovels or excavating tools 8 may be given a movement relatively to the arm 6 in the direction from the eripher to the center of the chamber and t ereby t ey shovel away superphosphate from the one. side of the 'heap of superphosphate resting within the riphery.

3 and 4 attached to endless chainsv 29 laid on vertical rolls 9, rotatably jour- .ried by said shaft and adapte decompositionchamber, and. atthe same time inclosing a free space or room within the.

chamber may be provided, the machinery then being during the char ing laced in the free space or room thus orme When the emptying process is to be started the said walls 13 are removed and the machinery operated in the way above described.

If the chamber as shown in Fig. 7 is of rectangular cross section, the mass remaining 1n the corners may be left there or it may be shoveled away by hand. Obviously" the chamber may also in this case be formed with circular cross section of such a diameter that the tools 8 will reach its inner pe- Havin declare t at what we claim is 1. Means for emptying a decomposition chamber of superphosphate comprising a decomposition chamber the mner walls of whichor parts thereof are in horizontal section curved upon a" circle, a vertical shaft arran ed in the center of said circle, a suprt or excavati tools pivotally-carried y said shaft, an adapted to be swung through the chamber along the bottom of the same, means for turning said support on its shaft through the chamber, excavating tools movably mounted in said support an means for moving said toolsrelatively to thus described our invention, we

their support in a direction from the periphery toward the center of the decomposition chamber.

2. Means .for emptying a decomposition chamber of superphosphate comprising a decomposition chamber the inner walls-of which or parts thereof are in horizontal section curved upon a'circle, radially arranged,

removablevertical walls by which the chamber is subdivided into sections, a vertical shaft arranged in the center of said circle, a support for excavating tools (pivotally carto be swung through the chamber along the bottom of the same, means for turning said support on its shaft through the chamber, excavatin tools movably mounted in said support an means for moving said' tools relatively to their support in a direction from the periphery against the center of the decomposition chamber. I

3. Means for empltying a decomposition chamber of superp osphate, comprising a 4= scenes vertical shaft, 9. support pivoted on said In testimony whereof we have signed our shaft, movable excavating tools on said supnames to this specification in the presence 10 port, means for turmng seid support of two subscribing Witnesses. through the chamber along the bottom of KNUT JAKOB BESKOW. 1

the same and means for moving the tools relatively to their su port in a; direction MELGHER EKEDAHL from the outer walls 0 the chamber toward Witnesses:

said shaft, and a discharge outlet adjacent SIGFRIED JACOBSSON,

I said shaft. NILs ENcsTnom. 

